Running tool



y 19, 1959 H. E. MCGOWEN, JR, ETAL 2,887,163

,RUNNI NG TOOL Filed Dec. 10, 1956 3 Sheets-Sheet 1 INVENTORS May 19, 195 H. E. MCGOWEN, JR.. NETAL RUNNING TOOL 3 Sheets-Sheet 2 Filed Dec. 10, 1956 f. M owe/ndr. f. Da /f? 5 C R N M W W m A y 9, 1959 H; E. MCGQWEN, JR., ETAL 2,887,163

RUNNING TOOL 3 Sheets-Sheet 3 Filed Dec. 10, 1956 INVENTORS H A. M owen 2 E Daff/fl United States Patent Ofiice 2,887,163 Patented May 19, 195Q RUNNING TOOL Harold E. McGowan, Jr., and Douglas E. Daflin, Houston, Tex., assignors to Cameo, Incorporated, Houston, Tex., acorporation of Texas Application December It), 1956, Serial No. 627,378

13 Claims. (Cl. 166-219) This invention relates to the installation of oil Well tools and more particularly to an improved running-in device by which a tool support can be lowered to and landed in a previously located receiver and then securely latched in place.

The usual installation practice is to couple the tool support to a wire line by and with reliance entirely on a load carrying shear pin and after the tool support is located at its receiver, it is freed from the wire line by the transmission through the line of a jar force to break the load carrying shear pin, and there has been experienced the accidental loss of tools released by premature shear pin breakage occasioned by overload, through rough handling, and unavoidable blows during the lowering operation, resulting in costly delay and not always successful fishing recovery work.

It is an object ofthe present invention to minimize unintentional release of the tool support by providing a more positive coupling in Which a shearable connection is completely relieved from running-in load and which can be easily and quickly fitted to a tool support and then lowered into a well without uncontrolled release until descent is arrested by a landing on the receiver and which solid seating on the tubing string nipple constituting the receiver is signaled at the top of the well and is a requirement for co-operation with control force transmitted through the Wire line in effecting both the proper release of the tool support and its latched securement in the receiver.

Another object of the invention is to provide a running tool assembly of relatively slida'ble parts of which a central pin and main suspension member is arranged to be securely fastened by a retractable key to the tool support for sustaining the load and from which it can be released only by overrunning a slidably fitted secondary member and key retaining sleeve, but such overrun does not occur until sleeve descent is arrested upon its landing upon the receiver, after which the overrun or continued descent of the main suspension member under applied jarring first causes breakage of a shear pin safety connection between the solidly landed or stopped secondary member and a depressible latch actuator and then shifts the central pin out of key retention relation to land and release the tool support and to depress the latch actuator for setting the tool support latch and concurrently enables a snap-out detent to interlock the main and secondary members in their release relation to the latched tool support for elevation and withdrawal of the running-in tool.

Other objects and advantages will become apparent during the course of the following specification having reference to the accompanying drawings wherein Figure 1 is a view showing the running-in tool half in section and half in elevation and showing a tool support in elevation and a receiver for the tool support partly in section and partly in elevation, with the tool support suspended by the running-in tool; Fig. 2 is a part section and part elevation of the parts illustrated in Fig. l with the running tool ready to be withdrawn after having latched the tool sup- 2 port in position; Figs. 3 and 4 are views partly in elevation and partly in section of a slightly modified type of tool support and running-in tool therefor and with the parts in coupled and uncoupled relations, respectively; Fig. 5 is an exploded perspective view of the tool support elements with which co-operates the running-in tool shown in Figs. 3 and 4; Fig. 6 is a transverse sectional view on line 66 of Fig. 1; and Fig. 7 is a transverse sectional view on a large scale and is taken at line 7-7 of Fig. 3.

Referring first to the tool support as shown in Fig. 5, there is involved a laterally slidable latch 1 having an eccentrically located opening therethroug'h which is of larger diameter than and is fitted loosely to a central support post or tube 2. Slidably mounted on the post 2 above the latch 1 is a sleeve 3 having depending legs 4 terminating in camming feet 5, which on downward movement of the slide sleeve 3 will enter the opening of the latch l and center the opening by a close fit thereto so as to maintain the latch projected laterally on one side of the tool support. When the carnming feet 5 are elevated clear of the latch opening, the latch no longer will be held in outwardly projected position but can move inwardly because of its loose fit to the support post. Its lateral sliding travel is guided between opposed faces on the underside of a series of circumferentially spaced lugs or bosses 6 welded or formed integrally with the tool support post 2 and the top side of a not 7 threaded on the lower end of the post 2 and itself having at its lower end a threaded nipple 8 which is for attachment to any of a number of conventional well tools selected for suspension in a well string.

The location of the well tool will be determined beforehand, as, for example, by incorporating at a given point in the production tubing string, a mandrel which includes a tubular pocket or tool support receiver as shown at 9 in Figs. 3 and 4 and which contains an internal annular recess 10 as a keeper for the eccentric latch 1 at a given distance below an abutment or landing seat here shown as being constituted by the upper edge of the receiver 9. For co-operation with this landing seat, the spaced bosses 6 on the support post 2 are of an axial length corresponding to the distance at which the annular recess 10 is formed below the receiver landing seat, and each boss 6 terminates upwardly in a radial enlargement or bearing head 11 which affords an overhanging shoulder to land on and suspend the tool support load from the receiver. The spaces between the bosses 6 slidably pocket the dependent legs 4 of the latch actuator sleeve 3, and additionally they also receive outwardly of the legs 4, as seen in Fig. 7, a group of three dependent arms 12 at the lower end of the outer sleeve or barrel 13 of the running-in tool and which arms 12 are also arranged with abutment landing seats at their lower ends for engagement on the support pocketing receiver 9, as will later be described.

On theupper end of the support post 2 and following assembly thereon of the slidable actuator sleeve 3, there is fitted and welded a keeper cap or sleeve 14 which has an annular latch dog receiving recess 14 for a purpose to be later referred to and which keeper sleeve also provides a limit stop for upward slide travel of the latch actuator sleeve 3 away from the guide bosses 6. Such upward movement will occur for removing the tool sup port from well tubing by means of a conventional wire line pulling tool which can be lowered into the well to snap over the head 15 at the upper end of the latch actuator sleeve and then lift it to raise the latch centering feet 5 clear of the latch and by engagement with the limit cap 14 raise the entire support and tool suspendedtherefrom.

In Figs. 1 and 2, the tool support, its eccentric latch generally similar to what has just been described except that the tubular receiver 16 has a tool support landing seat 17 spaced below the latch keeper annular groove 18. It also has a landing seat at its upper end for landing abutment of the lower terminal of a running tool outer sleeve 19. The tool support post 20 fits loosely through the eccentric latch 21 guided between the bottom nut 22 and relatively short length and circumferentially spaced apart bosses 23 carried by the post and between which are axially guided a series of three camming feet 24- at the lower end of the latch actuator sleeve 25 slidably embracing the post and having a pickup head 26 at its .upper end. Its upward movement on the post is stopped by abutment with the underside of the retainer cap or post head 27 secured to the top of the post 20. In this case, the bottom nut 22 has an exterior stepped diameter to correspond generally with the interior diameter of the receiver 16 and to provide an overhanging landing shoulder for abutment with the upwardly facing landing seat 17.

The running-in tool of Figs. 1 and 2 consists primarily of inner and outer concentric members slidably fitted to one another, to one of which the tool support is releasably connected until such time in a lowering operation as the other member engages with the tubular receiver and results in a relative sliding of the members, which sets the eccentric latch 21 and releases the running-in tool from the tool support. Thus the inner member as shown consists of a central core or plunger 28 which at its upper end can be threaded into a coupling nut 29 through which it preferably has a connection 30 with an ordinary stroke jar at the lower end of a Wire suspen- 'sion line in a conventional manner. This central core is slidably and closely fitted internally of the outer member comprising a hollow sleeve or barrel 19. For suspending the outer sleeve 19 on the core and defining one limit of relative slide travel, the sleeve is of stepped internal diameter, and the core similarly is of stepped external diameter to provide co-operating overlapping shoulders, one facing downwardly at 32 near the upper end of the sleeve and the other facing upwardly at 33 on the core.

The body of the slide core or suspension member 28 is generally hollow, and is open at its bottom end for nested reception, as will be described, of the upper end of the tool support post. Below the limit shoulder 33, the core extends for such length as to terminate in an abutment seat 34 for bearing engagement on the upper face of the end or pickup head 26 on the slidable latch actuator sleeve 25. In the initially assembled relation of Fig. 1, a slight clearance is advantageously provided between the head 26 and the abutment surface 34 to better assure absence of stress on the sleeve 25 prior to the eventual releasing operation. Immediately upward from the abutment seat 34, the cylindrical skirt of the hollow core 28 is formed with an annular succession of spaced radial slots for receiving laterally projectable T-shaped keys or dogs 35 (see Fig. 6).

When projected inwardly, the dogs 35 have their inner ends beyond the inside annular wall surface of the hollow core 28 for locking projection into an annular keeper notch 36 of the support post head 27. Top and bottom corners of the dog inner and outer ends are preferably chamfered for slide camming purposes. These T-shaped dogs are held in post retaining position by the abutment of their outer crosshead surfaces with the interior cylindrical surface of the slider sleeve 19 when the latter is suspended through the shoulders 32 and 33 by the suspension core 28. The releasable dogs can move outlieved portion 37 internally of the sleeve 19. That slide action cannot occur ordinarily until after the bottom of the dog positioning sleeve 19 has landed on the receiver 16. Also, it cannot occur until after the breakage of a shear pin or pins 38, each of which extends through side openings and an internal groove in the wall of the sleeve 19 and an external groove in a central belt region of the latch actuator slidable sleeve 25. By reason of the double releasable connection, but more particularly because the load is transmitted through the sleeve retained keys 35 and is not impressed on the shear pins 38, accidental uncoupling of the tool support from the runningin tool is unlikely to occur, even though the parts may be banged against the side of the tubing or come into striking abutment with tubing couplings.

For holding the outer sleeve 19 in upwardly retracted position after the shoulder 33 of the central core has been moved downwardly away from the internal shoulder 32 to a lower limit, there is provided a spring pressed poppet device including the detent 39 slidably guided for lateral projection through a side opening in the core 28 under influence of a coil spring 40. The location of the spring pressed poppet is such that it slidably bears on the inside of the sleeve 19 above the shoulder 32, until such time as the descent of the core relative to the dog positioning barrel or sleeve 19 reaches its lower limit, whereupon the head of the detent 39 will have dropped just below the shoulder 32 and popped out for engagement with the shoulder 32 in preventing return of the parts to their projected limit position. Thus, after a tool support has been landed and latched in place, the wire line 30 can be raised and the running-in tool lifted clear of the tool support without the latch dogs 35 being projected away from their release position as shown in Fig. 2.

In preparation for use of the running-in tool, the inner core 28 and the outer sleeve 19 will be slid on one another to a position like that of Fig. 2 in which the poppet 39 is outwardly projected beneath the shoulder 32 and dogs 35 are open to receive the post head 27. Then the tool support is introduced upwardly through the open bottom and hollow end of the running-in tool with the eccentric latch 21 retracted and its actuator sleeve 25 in elevated position on the post 20. Thereafter a punch or other hand probe is inserted through a side window 41 in the wall of the sleeve 19 to depress the poppet 39 and allow downward movement of the dog positioning sleeve 19, whereupon the outwardly positioned dogs 35 will be cammed inwardly as the larger diameter zone or sleeve annular recess 37 falls out of line with the dogs and the smaller internal diameter portion of the sleeve then holds the dogs inwardly or projected into the keeper notch 36 in the upper terminal head of the tool support. Shear pins 38 are then inserted to releasably tie the actuator vsleeve 25 to the downwardly positioned sleeve 19, and

the parts are ready to be lowered into the well hole.

After the lowering operation has proceeded far enough that the supported tool and tool support have entered the receiver 16, the bottom of the outer sleeve 19 will come into abutment or be landed against the top edge of the stationary receiver 16 to stop the sleeve. Thereupon a downward jarring action imposed on the inner core 28, in a manner common in wire line operations, will be transferred from the key connected post head 27 into the head 26 on the slide actuator and cause the breaking or shearing of the pin 38. When this occurs, a further lowering of the plunger core and tool support assembly independently of the landed sleeve 19, will bring the downwardly facing landing seat on the nut 22 toward load carrying seating engagement with the upwardly facing landing surface 17 on the receiver 16 and will line up the shifter latch 21 with its keeper notch 18. At that time the clutching dogs 35 will again line up Withthe recess 37 for outward projection and release of their hold on the now landed support post and an additional descent of the core 28 through its abutment at the lower end seat 34, pushes the actuator sleeve down to enter its feet 24 into and lock the eccentric latch 21 in outwardly projected relation in itskeeper notch 18. As this occurs, the spring pressed poppet 39 will snap outwardly below the suspension shoulder 32 for retaining the released parts of the run-in tool in the relative positions shown in Fig. 2. When the wire line 30 is now reeled in, the running tool will clear the latched tool support parts and be raised to the surface.

In the modification illustrated in Figs. 3 and 4, the locking dogs 42 are fastened on the lower ends of flexible fingers 4-3 interposed in the clearance space between the outer sleeve 13 and the central core 44 and depended downwardly from a band or ring 45 fitted between the upwardly facing shoulder 46 on the core and the downwardly facing shoulder 47 on the sleeve. In this instance, the lower terminal edge of the core 44 slidably bears on the upwardly facing edge of each dog 42, and its downward force in the relation shown in Fig. 3 is transmitted through the dog into the post head 14 and there is a separation clearance between the lower terminal edge of the dog and the upper face of the pickup head 15 of the latch actuator sleeve 3. The inner surface of each dog 42 is shaped to conform with and to fit the annular taper sided recess 14' of the post head 14, and the outer face of the dog bears flatly against the inside surface of the upper portion of the sleeve immediately above the outwardly relieved or annular recessed portion 48 of the sleeve 13. A spring pressed poppet 49 is carried by the core 44- in position to project below the shoulder 47 and releasably clutch the parts together when they have been slid to the dog release position. The relative sliding of the sleeve and core. to dog release position is yieldably resistedby the force of a light coil spring 50 interposed between the top of the sleeve 13 and the wire line suspensioncoupling 51 at the upper end ofthe plunger core 44. Among other things, the force of the spring gives an additional factor of safety against accidental slide of the dog control sleeve 13. For some installations, the use of shearable pins can be omitted.

After the running-in; tool has been assembled and latched to the tool support, assembly by the procedure previously described in connection with Figs. 1 and 2, the parts are lowered until the bottom feet 12 on the dog control slider sleeve land on top of the receiver 9. Thereupon a jarring action on the core 44 transmitted through the post head 14 to the sleeve head 15 will break the safety shear pin connection 52, between the sleeve 13 and the latch actuator sleeve 3, and in the first increment of additional downward: movement of the core 44 independently of the landed sleeve 13, the landing head 11 of the tool support will come into seating engagement with the top of the receiver 9, whereupon the eccentric latch 1 is aligned with the keeper notch 10. At this time, also, the dogs 42 will have moved into alignment with the recess 48 of the landed sleeve 13 for freeing, them to shift laterally to release position clear of the locking notch 14' of the support post. In the final increment: of downward slide. movement of the core 44, the travel of the core will be transmitted through the dogs 42 to the head 15 and push down the sleeve 3 on the stationary tool support post and enter the camming feet into the latch opening for laterally shifting and retaining the latch, 1 within its receiving or keeper notch It). When that occurs, the detent 49 will snap outwardly below the shoulder 47 and the position of the parts will be that shown in Fig. 4 wherein the tool support is securely anchored in its receiver and the running tool is conditioned for being raised clear of the support and onto thetop of the well.

Various modifications and adaptations of the structure, specifically described. may be made within the scope of the appended claims.

What is claimed is:

1. In combination with a receiver and a well tool support adapted to be, retrievably mounted by said receiver and provided with a receiver engageable latch and a shiftable latch actuator, of a running tool comprising an inner core adapted for connection with a suspension line, an outer sleeve adapted to be sleeved at its lower end over the latch actuator, a releasable connection connecting said sleeve and the latch actuator and releasable in response to relative sleeve travel an abutment seat on said sleeve for landing the sleeve on said receiver, said sleeve having its upper end slidably sleeved on the inner core and suspended therefrom at the upper limit of core slide travel relative to the sleeve, a laterally shiftable dog car ried by the inner core and adapted to have an inner position for interlocking relation with a keeper on said Well tool support and to have an outer release position, internally stepped formations on said sleeve spaced apart in the direction of relative slide travel of the core and arranged one to engage and retain said dog in its inner position when the core is upwardly of the sleeve and the other to provide clearance for the dog in its outer position when the core is downwardly of the sleeve and a core carried abutment arranged to make contact with and transfer force to said latch actuator for shifting the same to latch setting position in the downward slide travel of the core relative to a landed sleeve.

2. In a well tool running-in device, an outer sleeve having an internal clearance recess inter-mediate its upper and lower ends, a landing seat at its lower end and an internal stop shoulder near its upper end, an inner core slidably received within said sleeve and provided with a landing seat at its lower end and an external stop shoulder near its upper end for co-operation with said internal stop shoulder as a limitstop in one direction of relative sleeve and core slide travel, said core including a laterally movable dog whose outer face bears on the inside of the sleeve to restrict dog movement outwardly from a tool support connection position when the sleeve and core are at their limit of slide travel in one direction, said clearance recess being positioned to align with said dog at another relative position of the core and the sleeve to accommodate outward movement of said dog and a spring pressed poppet carried by the core and engageable with the internal stop shoulder of said sleeve to maintain the core and sleeve at their opposite limit of slide travel.

3. In combination with a receiver and a well tool support having a receiver engaging latch and a depressible latch actuator, of a running-in device including a suspension member adapted to be lowered and later raised in a well by a suspension line and arranged. for releasable connection with the tool support and for motion transmitting bearing abutment with the latch actuator, the releasable connection comprising a laterally movable dog shiftably carried by said suspension member for transferbetween tool support connecting and disconnecting positions, a slider member slidably suspended by said suspension member and relatively slidable between an initial lower position and a later upper position relative to said suspension member, an abutment stop on the slider member for landing engagement with the receiver in the lowering of, said suspension member to effect upward sliding of the slider member on the suspension member, a dog bearing surface on the slider member engageable with the dog to retain the dog in its connecting position when the slider member is in its lower position and shiftable upwardly out of engagement with the dog to release said dog for movement to its disconnecting position when the slider member is in its upper position and a releasable connection joining said slider member in its lower posi tion to the latch actuator and being releasablein response to downward movement transmitted from the suspension member to said latch actuator relative to the slider member.

4. The combination as described in claim 3 wherein a member interconnector is carried-by one of the members and interlocks with the other member in the upper position of the slider member and resists return of the slider member. to its lower position.

r. 5.- For landing a well tool support on a'receiver and then depressing an actuator to latch the support in the receiver, a central core adapted for suspension at its upper end from a suspension line and terminated at its lower end in an abutment seat for engagement with a latch actuator to depress the same after the tool support has been landed, a series of circumferentially spaced dogs slidably mounted in slots in said central core immediately above said abutment seat for lateral movement outwardly from an inwardly projected suspension relation with a tool support, a sleeve slidably suspended on said core and terminated at its lower end in an abutment seat for landing engagement with a support receiver and for upward sliding on the central core as the latter is lowered beyond the landed sleeve, said sleeve having an internal bearing surface engaging and retaining said dogs against outward movement in their slots prior to the landing of the sleeve and said sleeve also having in the region below said hearing surface an outwardly relieved portion into which said dogs can move from tool support suspension relation and which relieved portion is brought into alignment with said dogs by the lowering of the core beyond the landed sleeve, whereupon further descent of the core can be transmitted through its abutment seat for latch actuator depression.

6. For lowering into a receiver in a well hole and latching in place a device having two parts one of which is a support and has a laterally projectable latch and a landing abutment engageable with the receiver to align said latch with a keeper formation on the receiver and the other of which has an axially slidable latch actuator initially held releasably in an upper position with the laterally projectable latch retracted, a running tool comprising a core and a sleeve slidably fitted to one another with the sleeve extending below the core for insertion therein of said actuator and terminating in a stop abutment engageable with said receiver, means for securing said sleeve by a breakable tie to said actuator, an external abutment shoulder on the core and an internal abutment shoulder on the sleeve spaced above the core shoulder and vertically overlapping the same, a lug interposed between said shoulders and provided with a dependent bendable arm Within the space between the core and sleeve and with an inwardly projected dog at the lower end of the bendable finger to bear upwardly on a downwardly facing edge portion of said core and to bear downwardly on an upwardly facing surface of an actuator tied to said sleeve for the transmission of core motion through the dog to said actuator after the sleeve has been landed on the receiver, said sleeve having an inner surface slidably bearing on the outer face of said bendable finger to retain the same in inwardly retracted position and said dog located to lock with a portion of said support part of the device, said sleeve also having an internal recess in a region below said sleeve bearing surface and which recess is of a depth such that when the dog is moved with the core downwardly into alignment with the recess the finger can bend outwardly to a projected dog release posit-ion and a spring pressed poppet carried by the core and bearing in retracted relation on the sleeve in the initial position of the parts and being movable downwardly with the core to a position below said internal shoulder and to pop under said shoulder and thereafter prevent upward travel of the core relative to the sleeve for maintaining said bendable finger in outwardly projected relation with said recess.

' 7. For landing a well tool support which includes a latch and an actuator therefor on a receiver and then depressing said actuator to latch the support in the receiver, a running-in device comprising an outer sleeve having a receiver engageable landing abutment at its lower end, an inner core slidably fitted to said sleeve and adapted for connection at its upper end with a suspension line, a pair of co-operating shoulders, one on the core and the other on the sleeve in overhanging relation to the shoulder on the core to hang the sleeve from the core,

a series of annularly spaced dogs each having anup wardly facing abutment surface laterally slidably engaging a downward facing abutment on said core and having an upwardly extending flexible attachment leg interposed between .the core andthe sleeve and upwardly secured to the core, each'dog also having an inwardly disposed tool support interlocking formation and an outwardly facing surface engageable with an interior surface of the sleeve to hold the dogs inwardly positioned when the sleeve is hung from the core through said shoulders, said interior sleeve surface being outwardly relieved for alignment with and outward movement of the dogs when the core slides downwardly in the sleeve and each dog also having a downwardly facing actuator engageable seat for transmitting core downward slide travel relative to the sleeve.

8. In a device of the character described, an outer sleeve having a landing seat near one end, an inner plunger core slidably fitted to said sleeve, overhanging abutments on the core and the sleeve to define a limit of relative slide travel in 'one direction, a laterally shiftable dog carried by the core within the sleeve and restrained by an adjoining portion of the sleeve from shifting outward from a tool retaining position when said core and sleeve are positioned near said limit of relative slide travel, said sleeve being outwardly relieved in a region to be aligned with said dog when said core and sleeve are positioned away from said relative travel limit for accommodating outward shifting of the dog from said tool retaining position and means for fastening said sleeve to a core engaged tool latch actuator by a tie which is breakable in response to force transmitted from the core in the relative slide travel of the core and the sleeve away from said travel limit after said dog has shifted into said relieved region of the sleeve.

9. In combination, a retrievable well tool, a receiver therefor, co-operating latch elements on the well tool and the receiver, a latch element controlling actuator shiftable on the well tool and a running-in device including an inner core and an outer sleeve slidably fitted to one another, a bearing abutment at the lower end of the core for motion transmitting engagement with the shiftable actuator, a bearing abutment at the lower end of the sleeve for descent limiting engagement with said tool receiver, a connection releasably joining said sleeve and said actuator, abutment seats on the core and the sleeve co-operating with one another at one limit of relative sleeve travel for suspending the sleeve on the core, a core carried laterally movable dog having suspending engagement with said well tool at an inward dog position, a bearing surface internally of the sleeve having an upper portion engaging and retaining said dog in its inward position when said sleeve is suspended by the abutment seats and having a lower outwardly relieved portion providing clearance for outward dog movement out of well tool engagement when said sleeve is supported by its bearing abutment and the inner core has been slid downwardly relative to the sleeve and has transmitted latch actuating motion to said actuator.

10. The combination described in claim 9 wherein initially inactive means is carried by one of the slidably fitted cores and the sleeve and is laterally projectable into interlocking relation with the other thereof in response to relative downward sliding movement of said core to dog release position and thereafter suspends the sleeve from the core with said dog positioned outwardly in said relieved portion.

11. For lowering a well tool support having a latch actuator into a receiver, a suspension line device including inner and outer concentric members slidably fitted one to the other, a laterally movable dog carried by the inner member, a latch actuator engaging and motion transmitting abutment seat on said dog, said dog having a bearing surface engaged by the outer member in one relative position of said members and being inwardly retracted thereby into a tool support interlocking position, said outer member having a clearance space aligned with said bearing surface on the dog in another relative position of said members for outward projection of said dog to a tool support unlocking position and a detent initially inactive to prevent relative movement of said members and operative after a predetermined range of relative movement to thereafter hold said members in their last mentioned relative position.

12. For setting and latching a well tool support in a 10 receiver, a suspension line running tool including an inner core member and an outer sleeve member slidably fitted one to another for relative movement from a preset tool support interlocking position to a release position, a latch actuating abutment on one member for the transmission of such relative movement, a tool support interlocking dog laterally shiftably carried by said one member, a receiver engaging landing abutment on the other of said members, a bearing surface on the last mentioned member engaging said dog and restraining shifting of the dog prior to relative member movement to said release position, said last mentioned member having a dog clearance space in a region thereof to align with and accommodate shifting of the dog when the relatively slidable members are in said release position.

13. The structure of claim 12, together with a spring pressed poppet carried by one of said members and a poppet engaging seat on the other member engageable by the poppet upon member movement to release position.

References Cited in the file of this patent UNITED STATES PATENTS Marshall et a1 Dec. 28, 1954 2,713,910 Baker et a1. July 26, 1955 2,737,245 Knox Mar. 6, 1956 

